C# MySqlPacket.ReadString方法代码示例

        IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
        {
            if (nullVal)
                return new MySqlUInt32((this as IMySqlValue).MySqlDbType, true);

            if (length == -1)
                return new MySqlUInt32((this as IMySqlValue).MySqlDbType,
                     (uint)packet.ReadInteger(4));
            else
                return new MySqlUInt32((this as IMySqlValue).MySqlDbType,
                     UInt32.Parse(packet.ReadString(length), NumberStyles.Any, CultureInfo.InvariantCulture));
        }

        IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
        {
            if (nullVal)
                return new MySqlString(type, true);

            string s = String.Empty;
            if (length == -1)
                s = packet.ReadLenString();
            else
                s = packet.ReadString(length);
            MySqlString str = new MySqlString(type, s);
            return str;
        }

    public void Open()
    {
      // connect to one of our specified hosts
      try
      {
#if !CF
        if (Settings.ConnectionProtocol == MySqlConnectionProtocol.SharedMemory)
        {
          SharedMemoryStream str = new SharedMemoryStream(Settings.SharedMemoryName);
          str.Open(Settings.ConnectionTimeout);
          baseStream = str;
        }
        else
        {
#endif
          string pipeName = Settings.PipeName;
          if (Settings.ConnectionProtocol != MySqlConnectionProtocol.NamedPipe)
            pipeName = null;
          StreamCreator sc = new StreamCreator(Settings.Server, Settings.Port, pipeName,
              Settings.Keepalive, this.Version);
#if !CF
         if (Settings.IncludeSecurityAsserts)
            MySqlSecurityPermission.CreatePermissionSet(false).Assert();
#endif
          baseStream = sc.GetStream(Settings.ConnectionTimeout);
#if !CF
        }
#endif
      }
      catch (System.Security.SecurityException)
      {
        throw;
      }
      catch (Exception ex)
      {
        throw new MySqlException(Resources.UnableToConnectToHost,
            (int)MySqlErrorCode.UnableToConnectToHost, ex);
      }
      if (baseStream == null)
        throw new MySqlException(Resources.UnableToConnectToHost,
            (int)MySqlErrorCode.UnableToConnectToHost);

      int maxSinglePacket = 255 * 255 * 255;
      stream = new MySqlStream(baseStream, Encoding, false);

      stream.ResetTimeout((int)Settings.ConnectionTimeout * 1000);

      // read off the welcome packet and parse out it's values
      packet = stream.ReadPacket();
      int protocol = packet.ReadByte();
      string versionString = packet.ReadString();
      version = DBVersion.Parse(versionString);
      if (!version.isAtLeast(5, 0, 0))
        throw new NotSupportedException(Resources.ServerTooOld);
      threadId = packet.ReadInteger(4);
      encryptionSeed = packet.ReadString();

      maxSinglePacket = (256 * 256 * 256) - 1;

      // read in Server capabilities if they are provided
      ClientFlags serverCaps = 0;
      if (packet.HasMoreData)
        serverCaps = (ClientFlags)packet.ReadInteger(2);

      /* New protocol with 16 bytes to describe server characteristics */
      owner.ConnectionCharSetIndex = (int)packet.ReadByte();

      serverStatus = (ServerStatusFlags)packet.ReadInteger(2);

      // Since 5.5, high bits of server caps are stored after status.
      // Previously, it was part of reserved always 0x00 13-byte filler.
      uint serverCapsHigh = (uint)packet.ReadInteger(2);
      serverCaps |= (ClientFlags)(serverCapsHigh << 16);

      packet.Position += 11;
      string seedPart2 = packet.ReadString();
      encryptionSeed += seedPart2;

      string authenticationMethod = "";
      if ((serverCaps & ClientFlags.PLUGIN_AUTH) != 0)
      {
        authenticationMethod = packet.ReadString();
      }
      else
      {
        // Some MySql versions like 5.1, don't give name of plugin, default to native password.
        authenticationMethod = "mysql_native_password";
      }

      // based on our settings, set our connection flags
      SetConnectionFlags(serverCaps);

      packet.Clear();
      packet.WriteInteger((int)connectionFlags, 4);

#if !CF
      if ((serverCaps & ClientFlags.SSL) == 0)
      {
        if ((Settings.SslMode != MySqlSslMode.None)
        && (Settings.SslMode != MySqlSslMode.Preferred))
//.........这里部分代码省略.........

    public int GetResult(ref int affectedRow, ref long insertedId)
    {
      try
      {
        packet = stream.ReadPacket();
      }
      catch (TimeoutException)
      {
        // Do not reset serverStatus, allow to reenter, e.g when
        // ResultSet is closed.
        throw;
      }
      catch (Exception)
      {
        serverStatus = 0;
        throw;
      }

      int fieldCount = (int)packet.ReadFieldLength();
      if (-1 == fieldCount)
      {
        string filename = packet.ReadString();
        SendFileToServer(filename);

        return GetResult(ref affectedRow, ref insertedId);
      }
      else if (fieldCount == 0)
      {
        // the code to read last packet will set these server status vars 
        // again if necessary.
        serverStatus &= ~(ServerStatusFlags.AnotherQuery |
                          ServerStatusFlags.MoreResults);
        affectedRow = (int)packet.ReadFieldLength();
        insertedId = (long)packet.ReadFieldLength();

        serverStatus = (ServerStatusFlags)packet.ReadInteger(2);
        warnings += packet.ReadInteger(2);
        if (packet.HasMoreData)
        {
          packet.ReadLenString(); //TODO: server message
        }
      }
      return fieldCount;
    }

        IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
        {
            if (nullVal) return new MySqlDateTime(type, true);

            if (length >= 0)
            {
                string value = packet.ReadString(length);
                return ParseMySql(value, packet.Version.isAtLeast(4, 1, 0));
            }

            long bufLength = packet.ReadByte();
            int year = 0, month = 0, day = 0;
            int hour = 0, minute = 0, second = 0;

            if (bufLength >= 4)
            {
                year = packet.ReadInteger(2);
                month = packet.ReadByte();
                day = packet.ReadByte();
            }

            if (bufLength > 4)
            {
                hour = packet.ReadByte();
                minute = packet.ReadByte();
                second = packet.ReadByte();
            }

            if (bufLength > 7)
                packet.ReadInteger(4);

            return new MySqlDateTime(type, year, month, day, hour, minute, second);
        }

 IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
 {
   MySqlGuid g = new MySqlGuid();
   g.isNull = true;
   g.OldGuids = OldGuids;
   if (!nullVal)
   {
     if (OldGuids)
       return ReadOldGuid(packet, length);
     string s = String.Empty;
     if (length == -1)
       s = packet.ReadLenString();
     else
       s = packet.ReadString(length);
     g.mValue = new Guid(s);
     g.isNull = false;
   }
   return g;
 }

    IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length,
    bool nullVal)
    {
      if (nullVal)
        return new MySqlDouble(true);

      if (length == -1)
      {
        var b = new byte[8];
        packet.Read(b, 0, 8);
        return new MySqlDouble(BitConverter.ToDouble(b, 0));
      }
      var s = packet.ReadString(length);
      double d;
      try
      {
        d = Double.Parse(s, CultureInfo.InvariantCulture);
      }
      catch (OverflowException)
      {
        // MySQL server < 5.5 can return values not compatible with
        // Double.Parse(), i.e out of range for double.

        if (s.StartsWith("-", StringComparison.Ordinal))
          d = double.MinValue;
        else
          d = double.MaxValue;
      }
      return new MySqlDouble(d);
    }

    IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
    {

      if (nullVal) return new MySqlDateTime(type, true);

      if (length >= 0)
      {
        var value = packet.ReadString(length);
        return ParseMySql(value);
      }

      long bufLength = packet.ReadByte();
      int year = 0, month = 0, day = 0;
      int hour = 0, minute = 0, second = 0, millisecond = 0;
      if (bufLength >= 4)
      {
        year = packet.ReadInteger(2);
        month = packet.ReadByte();
        day = packet.ReadByte();
      }

      if (bufLength > 4)
      {
        hour = packet.ReadByte();
        minute = packet.ReadByte();
        second = packet.ReadByte();
      }

      if (bufLength > 7)
      {
        millisecond = packet.Read3ByteInt();
        packet.ReadByte();
      }

      return new MySqlDateTime(type, year, month, day, hour, minute, second, millisecond);
    }

    IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
    {
      if (nullVal)
        return new MySqlInt16(true);

      if (length == -1)
        return new MySqlInt16((short)packet.ReadInteger(2));
      else
        return new MySqlInt16(Int16.Parse(packet.ReadString(length)));
    }

		IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
		{
			if (nullVal) return new MySqlTimeSpan(true);

			if (length >= 0)
			{
				string value = packet.ReadString(length);
				ParseMySql(value);
				return this;
			}

			long bufLength = packet.ReadByte();
			int negate = 0;
			if (bufLength > 0)
				negate = packet.ReadByte();

			isNull = false;
			if (bufLength == 0)
				isNull = true;
			else if (bufLength == 5)
				mValue = new TimeSpan(packet.ReadInteger(4), 0, 0, 0);
			else if (bufLength == 8)
				mValue = new TimeSpan(packet.ReadInteger(4),
					 packet.ReadByte(), packet.ReadByte(), packet.ReadByte());
			else
				mValue = new TimeSpan(packet.ReadInteger(4),
					 packet.ReadByte(), packet.ReadByte(), packet.ReadByte(),
					 packet.ReadInteger(4) / 1000000);

			if (negate == 1)
				mValue = mValue.Negate();
			return this;
		}

    IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
    {
      if (nullVal)
        return new MySqlUInt64(true);

      if (length == -1)
        return new MySqlUInt64(packet.ReadULong(8));
      else
        return new MySqlUInt64(UInt64.Parse(packet.ReadString(length)));
    }

    private void AuthenticateSSPI()
    {

      string targetName = ""; // target name (required by Kerberos)

      // First packet sent by server should include target name (for
      // Kerberos) as UTF8 string. It might however be prepended by junk 
      // at the start of the string (0xfe"authentication_win_client"\0,
      // see Bug#57442), this junk will be ignored. Target name can also 
      // be an empty string if server is not running in a domain environment, 
      // in this case authentication will fallback to NTLM.

      // Note that 0xfe byte at the start could also indicate that windows
      // authentication is not supported by sérver, we throw an exception
      // if this happens.

      packet = stream.ReadPacket();
      byte b = packet.ReadByte();
      if (b == 0xfe)
      {
        string authMethod = packet.ReadString();
        if (authMethod.Equals(AuthenticationWindowsPlugin))
        {
          targetName = packet.ReadString(Encoding.UTF8);
        }
        else
        {
          // User has requested Windows authentication,  bail out.
          throw new MySqlException("unexpected authentication method " +
              authMethod);
        }
      }
      else
      {
        targetName = Encoding.UTF8.GetString(packet.Buffer, 0, packet.Buffer.Length);
      }

      // Do SSPI authentication handshake
      SSPI sspi = new SSPI(targetName, stream.BaseStream, stream.SequenceByte, version);
      sspi.AuthenticateClient();

      // read ok packet.
      packet = stream.ReadPacket();
      ReadOk(false);
    }

        public void Open()
        {
            // connect to one of our specified hosts
            try
            {
                baseStream = StreamCreator.GetStream(Settings);
                //#if !CF && !RT
                //         if (Settings.IncludeSecurityAsserts)
                //            MySqlSecurityPermission.CreatePermissionSet(false).Assert();
                //#endif
            }
            catch (System.Security.SecurityException)
            {
                throw;
            }
            catch (Exception ex)
            {
                throw new MySqlException("Resources.UnableToConnectToHost",
                    (int)MySqlErrorCode.UnableToConnectToHost, ex);
            }
            if (baseStream == null)
                throw new MySqlException("Resources.UnableToConnectToHost",
                    (int)MySqlErrorCode.UnableToConnectToHost);

            int maxSinglePacket = 255 * 255 * 255;
            stream = new MySqlStream(baseStream, Encoding, false);

            stream.ResetTimeout((int)Settings.ConnectionTimeout * 1000);

            // read off the welcome packet and parse out it's values
            packet = stream.ReadPacket();
            int protocol = packet.ReadByte();
            string versionString = packet.ReadString();
            owner.isFabric = versionString.EndsWith("fabric", StringComparison.OrdinalIgnoreCase);
            version = DBVersion.Parse(versionString);
            if (!owner.isFabric && !version.isAtLeast(5, 0, 0))
                throw new NotSupportedException("Resources.ServerTooOld");

            threadId = packet.ReadInteger(4);

            byte[] seedPart1 = packet.ReadStringAsBytes();

            maxSinglePacket = (256 * 256 * 256) - 1;

            // read in Server capabilities if they are provided
            ClientFlags serverCaps = 0;
            if (packet.HasMoreData)
                serverCaps = (ClientFlags)packet.ReadInteger(2);

            /* New protocol with 16 bytes to describe server characteristics */
            owner.ConnectionCharSetIndex = (int)packet.ReadByte();

            serverStatus = (ServerStatusFlags)packet.ReadInteger(2);

            // Since 5.5, high bits of server caps are stored after status.
            // Previously, it was part of reserved always 0x00 13-byte filler.
            uint serverCapsHigh = (uint)packet.ReadInteger(2);
            serverCaps |= (ClientFlags)(serverCapsHigh << 16);

            packet.Position += 11;
            byte[] seedPart2 = packet.ReadStringAsBytes();
            encryptionSeed = new byte[seedPart1.Length + seedPart2.Length];
            seedPart1.CopyTo(encryptionSeed, 0);
            seedPart2.CopyTo(encryptionSeed, seedPart1.Length);

            string authenticationMethod = "";
            if ((serverCaps & ClientFlags.PLUGIN_AUTH) != 0)
            {
                authenticationMethod = packet.ReadString();
            }
            else
            {
                // Some MySql versions like 5.1, don't give name of plugin, default to native password.
                authenticationMethod = "mysql_native_password";
            }

            // based on our settings, set our connection flags
            SetConnectionFlags(serverCaps);

            packet.Clear();
            packet.WriteInteger((int)connectionFlags, 4);
            packet.WriteInteger(maxSinglePacket, 4);
            packet.WriteByte(33); //character set utf-8
            packet.Write(new byte[23]);

            #if !CF && !RT
            if ((serverCaps & ClientFlags.SSL) == 0)
            {
                if ((Settings.SslMode != MySqlSslMode.None)
                && (Settings.SslMode != MySqlSslMode.Preferred))
                {
                    // Client requires SSL connections.
                    string message = String.Format("Resources.NoServerSSLSupport",

                        Settings.Server);
                    throw new MySqlException(message);
                }
            }
            else if (Settings.SslMode != MySqlSslMode.None)
            {
//.........这里部分代码省略.........

    IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
    {
      if (nullVal)
        return new MySqlDecimal(true);

      string s = String.Empty;
      if (length == -1)
        s = packet.ReadLenString();
      else
        s = packet.ReadString(length);
      return new MySqlDecimal(s);
    }

    public IMySqlValue ReadValue(MySqlPacket packet, long length, bool isNull)
    {
      this.isNull = isNull;
      if (isNull)
        return this;

      if (length == -1)
        length = packet.ReadFieldLength();

      if (ReadAsString)
        mValue = UInt64.Parse(packet.ReadString(length));
      else
        mValue = (UInt64)packet.ReadBitValue((int)length);
      return this;
    }